AK4631 Datasheet, PDF (58/69 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

ASAHI KASEI
[AK4631]
2. PLL εϨʔϒϞʔυͰ֎෦ΫϩοΫ (FCK or BICK pin) Λ࢖༻͢Δ৔߹
Power Supply
PDN pin
PMVCM bit
(Addr:00H, D6)
MCKPD bit
(Addr:01H, D2)
PMPLL bit
(Addr:01H, D0)
FCK pin
BICK pin
Internal Clock
(1)
(2) (3)
(4) "H"
Example:
Audio I/F Format : DSP Mode, BCKP = MSBS = “0”
PLL Reference clock: BICK
BICK frequency: 64fs
Sampling Frequency: 8kHz
4f₍s₁o₎ f_{Power Supply & PDN pin = “L” Æ “H”}
(2) Addr:04H, Data:30H
Addr:05H, Data:00H
Input
(5)
(3) Addr:00H, Data:40H
(4) Addr:01H, Data:05H
(6)
Figure 44. Clock Set Up Sequence (2)
BICK and FCK input
<खॱྫ>
(1)ޙ্ཱ͛ͪݯిɺPDN pin “L” → “H”
(1)ͷ۠ؒ͸AK4631ͷϦηοτͷͨΊɺ150nsҎ্ͷ “L”͕۠ؒඞཁͰ͢ɻ
(2)͜ͷ۠ؒʹɺDIF1-0, FS2-0, PLL3-0, MSBS, BCKP bitͷઃఆΛߦͬͯԼ͍͞ɻ
(3)VCOMͷύϫʔΞοϓɿ PMVCM bit = “0” → “1”
֤ϒϩοΫΛ্ཱͪ͛Δલʹ࠷ॳʹVCOMΛ্ཱͪ͛ͯԼ͍͞ɻ
(4)MCKI pinͷϓϧμ΢ϯ : MCKPD bit = “1”
(5)PMPLL bit͕ “0” Æ “1”ʹͳΓɺPLLج४ΫϩοΫʢFCK or BICK pinʣ͕͞څڙΕͨޙɺPLLಈ࡞͕ελʔτ͠·
͢ɻPLLͷϩοΫ࣌ؒ͸FCK͕PLLج४ΫϩοΫೖྗͷ৔߹ɺ160ms(max), BICK͕PLLج४ΫϩοΫͷ৔߹ɺ
2ms(max)Ͱ͢ɻ
(6) PLL͕҆ఆޙɺਖ਼ৗͳಈ࡞͕։࢝͠·͢ɻ
MS0317-J-01
- 58 -
2004/11